awarzynski updated this revision to Diff 336075.
awarzynski added a comment.
Refine comments, remove code for aliases (which didn't work anyway)
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D99353/new/
https://reviews.llvm.org/D99353
Files:
clang/include/clang/Basic/DiagnosticDriverKinds.td
clang/lib/Driver/Driver.cpp
clang/test/Driver/flang-only-option-diags.c
clang/test/Driver/flang-only-options.c
Index: clang/test/Driver/flang-only-options.c
===================================================================
--- /dev/null
+++ clang/test/Driver/flang-only-options.c
@@ -0,0 +1,70 @@
+// Verifies that Flang options marked as `FlangOnlyOption` are corectly recognised and warned about by Clang.
+//
+// TODO: Add aliases (once working)
+
+// RUN: %clang -fsyntax-only \
+// SKIP: -Xflang \ This option is currently parsed by Clang as OPT_X_Flang (i.e. `-X flang` rather than `-Xflang`)
+// RUN: -ffree-form \
+// RUN: -ffixed-form \
+// RUN: -module-dir \
+// RUN: -ffixed-line-length=1 \
+// RUN: -fopenacc \
+// RUN: -fdefault-double-8 \
+// RUN: -fdefault-integer-8 \
+// RUN: -fdefault-real-8 \
+// RUN: -flarge-sizes \
+// RUN: -fbackslash \
+// RUN: -fno-backslash \
+// RUN: -fxor-operator \
+// RUN: -fno-xor-operator \
+// RUN: -flogical-abbreviations \
+// RUN: -fno-logical-abbreviations \
+// RUN: -fimplicit-none \
+// RUN: -fno-implicit-none \
+// RUN: -falternative-parameter-statement \
+// RUN: -fintrinsic-modules-path \
+// RUN: -test-io \
+// RUN: -fdebug-unparse \
+// RUN: -fdebug-unparse-with-symbols \
+// RUN: -fdebug-dump-symbols \
+// RUN: -fdebug-dump-parse-tree \
+// RUN: -fdebug-dump-provenance \
+// RUN: -fdebug-dump-parsing-log \
+// RUN: -fdebug-measure-parse-tree \
+// RUN: -fdebug-pre-fir-tree \
+// RUN: -fdebug-module-writer \
+// RUN: -fget-symbols-sources \
+// RUN: %s 2>&1 | FileCheck %s
+
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-ffree-form' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-ffixed-form' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-module-dir' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-ffixed-line-length=1' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fopenacc' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdefault-double-8' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdefault-integer-8' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdefault-real-8' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-flarge-sizes' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fbackslash' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fno-backslash' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fxor-operator' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fno-xor-operator' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-flogical-abbreviations' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fno-logical-abbreviations' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fimplicit-none' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fno-implicit-none' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-falternative-parameter-statement' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fintrinsic-modules-path' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-test-io' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdebug-unparse' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdebug-unparse-with-symbols' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdebug-dump-symbols' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdebug-dump-parse-tree' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdebug-dump-provenance' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdebug-dump-parsing-log' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdebug-measure-parse-tree' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdebug-pre-fir-tree' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fdebug-module-writer' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// CHECK: clang-{{[0-9]+}}: warning: command line option '-fget-symbols-sources' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+
+int a;
Index: clang/test/Driver/flang-only-option-diags.c
===================================================================
--- /dev/null
+++ clang/test/Driver/flang-only-option-diags.c
@@ -0,0 +1,28 @@
+// Test the behaviour of clang with a `FlangOnlyOption` and various diagnostics
+// flags. We want to make sure that users can control whether Flang-only options
+
+// RUN: %clang -fsyntax-only -ffree-form %s 2>&1 | FileCheck %s --check-prefix=WARNING
+// RUN: not %clang -fsyntax-only -Werror -ffree-form %s 2>&1 | FileCheck %s --check-prefix=ERROR
+// RUN: %clang -fsyntax-only -Werror -Wno-unknown-argument -Wno-unused-command-line-argument -ffree-form %s 2>&1 | FileCheck %s --allow-empty --check-prefix=NO-DIAGS
+
+//---------------------------
+// EXPECTED OUTPUT - WARNING
+//---------------------------
+// WARNING: clang-{{[0-9]+}}: warning: command line option '-ffree-form' is only valid in Flang mode (i.e. for Fortran input) [-Wunknown-argument]
+// WARNING-NEXT: clang-{{[0-9]+}}: warning: argument unused during compilation: '-ffree-form' [-Wunused-command-line-argument]
+
+//------------------------
+// EXPECTED OUTPUT - ERROR
+//------------------------
+// ERROR: clang-13: error: command line option '-ffree-form' is only valid in Flang mode (i.e. for Fortran input) [-Werror,-Wunknown-argument]
+
+//---------------------------------
+// EXPECTED OUTPUT - NO DIAGNOSTICS
+//---------------------------------
+// NO-DIAGS-NOT: error
+// NO-DIAGS-NOT: warning
+
+//-------
+// INPUT
+//-------
+int a;
Index: clang/lib/Driver/Driver.cpp
===================================================================
--- clang/lib/Driver/Driver.cpp
+++ clang/lib/Driver/Driver.cpp
@@ -262,20 +262,44 @@
}
for (const Arg *A : Args.filtered(options::OPT_UNKNOWN)) {
- unsigned DiagID;
+ // The default diagnostic when the option is unknown
+ unsigned DiagID = diag::err_drv_unknown_argument;
+
+ // Try to find a good hint for the user
auto ArgString = A->getAsString(Args);
std::string Nearest;
- if (getOpts().findNearest(
- ArgString, Nearest, IncludedFlagsBitmask, ExcludedFlagsBitmask) > 1) {
- DiagID = IsCLMode() ? diag::warn_drv_unknown_argument_clang_cl
- : diag::err_drv_unknown_argument;
- Diags.Report(DiagID) << ArgString;
- } else {
+ unsigned Distance = getOpts().findNearest(
+ ArgString, Nearest, IncludedFlagsBitmask, ExcludedFlagsBitmask);
+ assert(Distance != 0 && "This option should not be 'unknown'");
+
+ if (Distance == 1) {
+ // Found a good suggestion - propose that through a diagnostic
DiagID = IsCLMode()
? diag::warn_drv_unknown_argument_clang_cl_with_suggestion
: diag::err_drv_unknown_argument_with_suggestion;
Diags.Report(DiagID) << ArgString << Nearest;
+ } else {
+ // No good suggestion was found - issue an error (default) or a warning.
+ // The actual diagnostic depends on the mode in which the driver operates
+ if (IsCLMode())
+ // In CL mode just warn the user (MSVC consumes everything anyway)
+ DiagID = diag::warn_drv_unknown_argument_clang_cl;
+ else if (!IsFlangMode()) {
+ // In non-Flang mode, warn _if_ this is a Flang-only flag. Clang will
+ // reject/ignore these, but like in GCC, this shouldn't be an error.
+ // TODO: Currently this will only work for non-alias options. Options
+ // that are aliases are internally stored as their non-alias versions.
+ // When mixed with `OPT_UNKNOWN`, this seems to confuse `findNearest`.
+ unsigned ExcludedFlagsBitmaskWithFlang =
+ ExcludedFlagsBitmask & ~options::FlangOnlyOption;
+ if (getOpts().findNearest(ArgString, Nearest, IncludedFlagsBitmask,
+ ExcludedFlagsBitmaskWithFlang) == 0)
+ DiagID = diag::warn_drv_flang_argument;
+ } // TODO: In Flang-mode, check whether this is a Clang-only flag.
+
+ Diags.Report(DiagID) << ArgString;
}
+
ContainsError |= Diags.getDiagnosticLevel(DiagID, SourceLocation()) >
DiagnosticsEngine::Warning;
}
Index: clang/include/clang/Basic/DiagnosticDriverKinds.td
===================================================================
--- clang/include/clang/Basic/DiagnosticDriverKinds.td
+++ clang/include/clang/Basic/DiagnosticDriverKinds.td
@@ -194,6 +194,9 @@
def err_drv_I_dash_not_supported : Error<
"'%0' not supported, please use -iquote instead">;
def err_drv_unknown_argument : Error<"unknown argument: '%0'">;
+def warn_drv_flang_argument : Warning<
+ "command line option '%0' is only valid in Flang mode (i.e. for Fortran input)">,
+ InGroup<UnknownArgument>;
def err_drv_unknown_argument_with_suggestion : Error<
"unknown argument '%0'; did you mean '%1'?">;
def warn_drv_unknown_argument_clang_cl : Warning<
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